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/**************************************************************************************
* FILE PURPOSE: Merge multiple boot tables into one boot table
**************************************************************************************
* FILE NAME: mergebtbl.c
*
* Usage: mergebtbl inputfile1 inputfile2 ... outputfile
* Note: may not support single line boot table(hardly possible)
*
**************************************************************************************/
#include <stdio.h>
#include <string.h>
int asciiByte (unsigned char c)
{
if ((c >= '0') && (c <= '9'))
return (1);
if ((c >= 'A') && (c <= 'F'))
return (1);
return (0);
}
int main (int argc, char *argv[])
{
FILE *strin;
FILE *strout;
int i,j,k;
int line;
int start;
char iline[132];
char iline2nd[132];
/* Verify the number of args */
if (argc < 3) {
printf ("usage: %s inpfile[1] ... infile[n] outfile\n", argv[0]);
return (-1);
}
strout = fopen (argv[argc-1], "w");
if (strout == NULL) {
printf ("could not open file %s to write\n",argv[argc-1]);
return (-1);
}
fputs("first line\n",strout);
fputs("second line\n",strout);
for(i=1; i<argc-1;i++) {
strin = fopen (argv[i], "r");
if (strin == NULL) {
printf ("could not open input file %s\n", argv[i]);
return (-1);
}
line = 0;
/* skip the next two lines */
fgets (iline, 132, strin);
fgets (iline, 132, strin);
if(fgets(iline2nd, 132, strin)==NULL) {
printf("error in boot table\n");
}
while(1) {
fgets(iline, 132, strin);
if(!asciiByte(iline[0])) break;
line++;
if(i!=1 && line==1) { /* if not the first file, get rid of entry point */
for(j=12; j<132; j++) {
if(iline2nd[j]=='\0') break;
fputc(iline2nd[j],strout);
}
} else {
fputs(iline2nd,strout);
}
strcpy(iline2nd,iline);
} /* while */
if(i!=argc-2) { /* If not the last file, get rid of ending 00 00 00 00 */
for(j=0,start=0;j<132;j+=2){
if((iline2nd[j]=='0')&&(iline2nd[j+1]=='0')) {
if(start) k++;
else if((j-j/4*4)==0) {
start = 1; /* not count from any 00 */
k=1;
}
}
else {
start = 0;
k=0;
}
if(k==4) { // when 00 00 00 00 reached
if(asciiByte(iline2nd[j+3])) { //if the next char is still ASCII
start = 0;
} else break; /* Ending 00 00 00 00 reach */
}
j++; /* skip the space */
}
if((k==4) && (j>10)) {
for(k=0;k<j-10;k++){
fputc(iline2nd[k],strout);
}
fputc('\n',strout);
}
} else {
fputs(iline2nd,strout);
}
fclose(strin);
} /* for */
fputc(0x04,strout); /* any non-ASCII character */
fclose(strout);
return (0);
}
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